I have a HIS Radeon iCooler V 5870, and lately I've been trying to overclock it. I downloaded MSI Afterburner, ramped it up to 900MHz (the most the slider would go up to) and played a while, and all seems well. I'm interested in going a little further, but the slider only goes up to 900MHz. Meanwhile, I hear about people clocking their 5870s much higher than just 900MHz. I can only set the slider to 900MHz, how do I break this limit?

[ATIADLHAL]
UnofficialOverclockingEULA = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
UnofficialOverclockingMode = 1
AccessibilityCheckingPeriod = 0

Hrm, I can test up to at least 944MHz stable with Kombustor overnight, but I get weird glitches. The screen will flicker and show what looks like corruption for a split second, then return to normal. It flickers often. Not sure what's happening here? I didn't touch the memory at all, only the core.

What's strange is it flickers even in 2D clocks, 157 core and 300 mem. It seems to be doing this just because higher clocks were set, even though it's not actually running at that speed when this happens. I didn't have this issue when I was stuck at only being able to go up to 900MHz though... ???

AMD imposes artificial overclocking restrictions on their cards, and has done so for several generations. I've had problems with the whole screen going nuts when I unlocked unofficial overclocking on my 7950 a while ago, even at stock clocks. I think it's something that hasn't been supported for quite some time, like the last year or so.

AMD imposes artificial overclocking restrictions on their cards, and has done so for several generations. I've had problems with the whole screen going nuts when I unlocked unofficial overclocking on my 7950 a while ago, even at stock clocks. I think it's something that hasn't been supported for quite some time, like the last year or so.

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Then how do people clock their cards through the roof? Just deal with the flickering and whatnot?

AMD imposes artificial overclocking restrictions on their cards, and has done so for several generations. I've had problems with the whole screen going nuts when I unlocked unofficial overclocking on my 7950 a while ago, even at stock clocks. I think it's something that hasn't been supported for quite some time, like the last year or so.

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Thats just a ridiculous statement...

i oced the hell out of my 5950, 6950, and now my 7970 ...

they don't impose anything...

they try to stop average joe from screwing up their card, but allow people who know what they are doing the overclock the hell out of them...